Drill-extractor.



E. WILSON & W. A. MGLEOD.

DRILL EXTRACTOR. APPLICATION FILED MAR.24, 1914.

1, 1 1 7,468, Patented Nov. 17, 1914.

[diva/d wall and Witne ses W ZmA/mfldnventors I r; by 7 r W Attorneys i UNITE EDWARD WILSON AND WILLIAM A. MOLEOD, OF IBISBEE, ARIZONA.

DRILL-EXTRACTOR.

Specification of Letters Patent.

Patented Nov. 1'7, 1914.

Application filed March 24, 1914. Serial No. 827,000.

To all whom it may concern:

Be it known that we, EDWARD WVILsoN and WVILLIAM A. MoL'coD, citizens of the United States, residing at Bisbee, in the county of Cochise and State of Arizona, have invented a new and useful Drill-Extractor, of which the following is a specification.

This invention relates to improvements in a drill extractor.

An object of the present invention is to provide an attachment which may be secured to a drill so that it may be extracted from damp or wet holes, and also can be used to extract a drill from flat holes drilled by a stepping machine.

A further object is to provide a device which will attain the aforementioned ends in an expeditious manner, will be serviceable and eflicient in use, and will be effective for the purposes desired.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings accompanying this specification and forming a part thereof, the preferred form of our invention has been shown, wherein Figure 1 is a view in side elevation of our improved drill extractor. Fig. 2 is a similar view taken in longitudinal section. Fig. 8 is a front end view of the device. Fig. f is a rear end view thereof.

Referring to the drawings in which similar reference numerals designate corresponding, parts throughout the several views, 5 indicates the body portion of the device and is provided with the bore 6 extending therein, communicating with which bore are the transverse apertures 7, through which a suitable holding or cotter pin may be driven, thus securing the device to a cylindrical shaft or similar member to aid in the extraction of the drill which is wedgedly secured to the opposite extremity of the body portion as will be hereinafter i explained. a

Extending forwardly from the body portion 5 are the grippingjaws 8, said jaws being formed by providing the cylindrical sleeve 9 with the longitudinally extending slot 10. The said slot divides the sleeve into two gripping jaws which are wedgedly forced together in order to engage the shank of a drill. The sleeve is provided with a substantially cruciform bore 11, extending therethrough, the inwardly projecting and oppositely disposed ridges 12 bevided with the straight parallel walls 15 and the inclined bottom 16. The inclination of the bottom wall 16 is such that it slopes centrally and rearwardly, as clearly illustrated in Fig. 2. The key 17 is provided with the angularly disposed faces 18 and 1D, the outer face 19 being complementary to the inclination of the bottom wall 16 and is adapted to continuously contact therewith. The sleeve is provided with the groove or key slot 20 extending longi tudinally thcrealong in which the key 17 extends. Thus the key is limited or constrained to longitudinal movement with respect to the sleeve and when driven inwardly will draw the opposite portion of the ring into forced engagement with the sleeve, thus compressing the two jaws together at diametric points quadrantially removed from the slot 10. The key is provided with the outstanding end '21 so that there will be no danger of the key being driven from beneath the ring which would result in its detachment from the device. Mention is also made of the fact that the ring and key as well as the sleeve, are so proportioned that with the key extended to its farthest point, there will be little likelihood of the key and ring becoming detached from the sleeve, this being provided for by so designing the sleeve as to at all times resiliently engage the key andfrictionally hold the key and ring against longitudinal movement with respect to the sleeve. The jaws of the sleeve will rigidly engage the drill shank without mutilating the same and thus provide for the ready and quick extraction of the drill.

Having thus fully described our invention, what we claim is I A drill extractor comprising a body portion provided with a bore extending therein, transversely alined apertures extending through the side walls of said body portion, a sleeve projecting from the said body portion, said sleeve provided with a longitudinal groove extending entirely through the side wall thereof, dividing the said sleeve into gripping jaws, one of said jaws provided with a longitudinal groove quadrantially removed from the said slot, a ring extending around and contacting with said gripping jaws, said ring provided with a groove adapted to aline with the groove of the said gripping jaw, said groove provided with an inclined bottom wall, and a tapering pin slidably positioned in the sleeve groove and engaging the ring groove, contacting with the inclined wall thereof and adapted to draw the said ring into wedged engagement with the said gripping jaws.

In testimony that we claim the foregoing as our own, we have hereto affiXed our signatures in the presence of two witnesses.

Witnesses HARRY H. MYERS, FRANK HoUsToN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. U. 

